| /* |
| * Ceph cache definitions. |
| * |
| * Copyright (C) 2013 by Adfin Solutions, Inc. All Rights Reserved. |
| * Written by Milosz Tanski (milosz@adfin.com) |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License version 2 |
| * as published by the Free Software Foundation. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to: |
| * Free Software Foundation |
| * 51 Franklin Street, Fifth Floor |
| * Boston, MA 02111-1301 USA |
| * |
| */ |
| |
| #ifndef _CEPH_CACHE_H |
| #define _CEPH_CACHE_H |
| |
| #ifdef CONFIG_CEPH_FSCACHE |
| |
| int ceph_fscache_register(void); |
| void ceph_fscache_unregister(void); |
| |
| int ceph_fscache_register_fs(struct ceph_fs_client* fsc); |
| void ceph_fscache_unregister_fs(struct ceph_fs_client* fsc); |
| |
| void ceph_fscache_inode_init(struct ceph_inode_info *ci); |
| void ceph_fscache_register_inode_cookie(struct ceph_fs_client* fsc, |
| struct ceph_inode_info* ci); |
| void ceph_fscache_unregister_inode_cookie(struct ceph_inode_info* ci); |
| |
| int ceph_readpage_from_fscache(struct inode *inode, struct page *page); |
| int ceph_readpages_from_fscache(struct inode *inode, |
| struct address_space *mapping, |
| struct list_head *pages, |
| unsigned *nr_pages); |
| void ceph_readpage_to_fscache(struct inode *inode, struct page *page); |
| void ceph_invalidate_fscache_page(struct inode* inode, struct page *page); |
| void ceph_queue_revalidate(struct inode *inode); |
| |
| static inline void ceph_fscache_invalidate(struct inode *inode) |
| { |
| fscache_invalidate(ceph_inode(inode)->fscache); |
| } |
| |
| static inline int ceph_release_fscache_page(struct page *page, gfp_t gfp) |
| { |
| struct inode* inode = page->mapping->host; |
| struct ceph_inode_info *ci = ceph_inode(inode); |
| return fscache_maybe_release_page(ci->fscache, page, gfp); |
| } |
| |
| #else |
| |
| static inline int ceph_fscache_register(void) |
| { |
| return 0; |
| } |
| |
| static inline void ceph_fscache_unregister(void) |
| { |
| } |
| |
| static inline int ceph_fscache_register_fs(struct ceph_fs_client* fsc) |
| { |
| return 0; |
| } |
| |
| static inline void ceph_fscache_unregister_fs(struct ceph_fs_client* fsc) |
| { |
| } |
| |
| static inline void ceph_fscache_inode_init(struct ceph_inode_info *ci) |
| { |
| } |
| |
| static inline void ceph_fscache_register_inode_cookie(struct ceph_fs_client* parent_fsc, |
| struct ceph_inode_info* ci) |
| { |
| } |
| |
| static inline void ceph_fscache_unregister_inode_cookie(struct ceph_inode_info* ci) |
| { |
| } |
| |
| static inline int ceph_readpage_from_fscache(struct inode* inode, |
| struct page *page) |
| { |
| return -ENOBUFS; |
| } |
| |
| static inline int ceph_readpages_from_fscache(struct inode *inode, |
| struct address_space *mapping, |
| struct list_head *pages, |
| unsigned *nr_pages) |
| { |
| return -ENOBUFS; |
| } |
| |
| static inline void ceph_readpage_to_fscache(struct inode *inode, |
| struct page *page) |
| { |
| } |
| |
| static inline void ceph_fscache_invalidate(struct inode *inode) |
| { |
| } |
| |
| static inline void ceph_invalidate_fscache_page(struct inode *inode, |
| struct page *page) |
| { |
| } |
| |
| static inline int ceph_release_fscache_page(struct page *page, gfp_t gfp) |
| { |
| return 1; |
| } |
| |
| static inline void ceph_fscache_readpages_cancel(struct inode *inode, |
| struct list_head *pages) |
| { |
| } |
| |
| static inline void ceph_queue_revalidate(struct inode *inode) |
| { |
| } |
| |
| #endif |
| |
| #endif |